linux-kernel - Re: [PATCH] MAINTAINERS: group all VMA-related files into the VMA section

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Message-ID: <557ba39e-960c-48d9-a59d-5756fc8b5679@redhat.com>
Date: Mon, 9 Dec 2024 15:25:37 +0100
From: David Hildenbrand <david@...hat.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Vlastimil Babka <vbabka@...e.cz>,
 Andrew Morton <akpm@...ux-foundation.org>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>, Jann Horn <jannh@...gle.com>,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] MAINTAINERS: group all VMA-related files into the VMA
 section

On 09.12.24 15:11, Lorenzo Stoakes wrote:
> On Mon, Dec 09, 2024 at 03:00:08PM +0100, David Hildenbrand wrote:
>> On 09.12.24 14:25, Vlastimil Babka wrote:
>>> On 12/9/24 10:16, David Hildenbrand wrote:
>>>> On 06.12.24 20:16, Lorenzo Stoakes wrote:
>>>>> There are a number of means of interacting with VMA operations within mm,
>>>>> and we have on occasion not been made aware of impactful changes due to
>>>>> these sitting in different files, most recently in [0].
>>>>>
>>>>> Correct this by bringing all VMA operations under the same section in
>>>>> MAINTAINERS. Additionally take the opportunity to combine MEMORY MAPPING
>>>>> with VMA as there needn't be two entries as they amount to the same thing.
>>>>>
>>>>> [0]:https://lore.kernel.org/linux-mm/CAG48ez0siYGB8GP5+Szgj2ovBZAkL6Zi4n6GUAjzzjFV9LTkRQ@mail.gmail.com/
>>>>>
>>>>> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
>>>>> ---
>>>>>     MAINTAINERS | 19 +++++++------------
>>>>>     1 file changed, 7 insertions(+), 12 deletions(-)
>>>>>
>>>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>>>> index 1e930c7a58b1..95db20c26f5f 100644
>>>>> --- a/MAINTAINERS
>>>>> +++ b/MAINTAINERS
>>>>> @@ -15060,18 +15060,6 @@ F:	tools/mm/
>>>>>     F:	tools/testing/selftests/mm/
>>>>>     N:	include/linux/page[-_]*
>>>>>
>>>>> -MEMORY MAPPING
>>>>> -M:	Andrew Morton <akpm@...ux-foundation.org>
>>>>> -M:	Liam R. Howlett <Liam.Howlett@...cle.com>
>>>>> -M:	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
>>>>> -R:	Vlastimil Babka <vbabka@...e.cz>
>>>>> -R:	Jann Horn <jannh@...gle.com>
>>>>> -L:	linux-mm@...ck.org
>>>>> -S:	Maintained
>>>>> -W:	http://www.linux-mm.org
>>>>> -T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>>>>> -F:	mm/mmap.c
>>>>> -
>>>>>     MEMORY TECHNOLOGY DEVICES (MTD)
>>>>>     M:	Miquel Raynal <miquel.raynal@...tlin.com>
>>>>>     M:	Richard Weinberger <richard@....at>
>>>>> @@ -25028,6 +25016,13 @@ L:	linux-mm@...ck.org
>>>>>     S:	Maintained
>>>>>     W:	https://www.linux-mm.org
>>>>>     T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>>>>> +F:	mm/madvise.c
>>>>> +F:	mm/mlock.c
>>>>> +F:	mm/mmap.c
>>>>> +F:	mm/mprotect.c
>>>>> +F:	mm/mremap.c
>>>>> +F:	mm/mseal.c
>>>>> +F:	mm/msync.c
>>>>
>>>> Not sure about mprotect.c, mlock.c and madvise.c, though. I'd claim that
>>>> the real "magic" they perform is in page table handling and not
>>>> primarily VMA handling (yes, both do VMA changes, but they are the
>>>> "easy" part ;) ).
>>>
>>> I'd think that moving vma files into MEMORY MAPPING (and not the other way)
>>> would result in a better overal name, that would be a better fit for the
>>> newly added files too?
>>
>> Maybe. I think vma.c should likely have a different set of maintainers than
>> madvise.c and mprotect.c. (again, the magic is in page table modifications)
> 
> The bulk of the logic in mremap.c is related to page tables so by this
> logic then, that is out too, right?

IMHO, yes.

-- 
Cheers,

David / dhildenb